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Finding the Fourth Proportional to 19,240.75, 28,862.75 and 5,389.75

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Solution

The fourth proportional to 19,240.75, 28,862.75 and 5,389.75 is: 8,085.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,240.75 : 28,862.75 = 5,389.75 : x
  2. Step 2: Convert to fraction form
    19,240.75/28,862.75 = 5,389.75/x
  3. Step 3: Cross multiply
    19,240.75x = 28,862.75 × 5,389.75
  4. Step 4: Simplify right side
    19,240.75x = 155,563,006.81
  5. Step 5: Solve for x
    x = 155,563,006.81/19,240.75
  6. Step 6: Final answer
    x = 8,085.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.